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https://issues.apache.org/jira/browse/DRILL-6724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16602255#comment-16602255
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ASF GitHub Bot commented on DRILL-6724:
---------------------------------------
vdiravka commented on a change in pull request #1455: DRILL-6724: Convert
IndexOutOfBounds exception to UserException with …
URL: https://github.com/apache/drill/pull/1455#discussion_r214687014
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/RecordReader.java
##########
@@ -49,4 +50,15 @@
* @return The number of additional records added to the output.
*/
int next();
+
+ /**
+ * Creates {@link UserException} with reader context. Should be analogous to
+ * {@link UserException#dataReadError(Throwable)} with provided context data.
+ * Returns {@code null} if context for a reader is unavailable.
+ *
+ * @param cause a {@code Throwable} to be wrapped into {@code UserException}
+ * @param message message to be passed to resulting {@code UserException}.
Nullable
+ * @return exception with context data
Review comment:
just add `instance` word to clarify that it is not thrown, but returned.
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> Convert IndexOutOfBounds exception to UserException with context data where
> possible
> ------------------------------------------------------------------------------------
>
> Key: DRILL-6724
> URL: https://issues.apache.org/jira/browse/DRILL-6724
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.14.0
> Reporter: Bohdan Kazydub
> Assignee: Bohdan Kazydub
> Priority: Major
> Fix For: 1.15.0
>
>
> Sometimes when IndexOutOfBoundsException is exposed to users it is not clear
> what causes the problem. Instead this exception may be converted to a more
> useful UserException containing context data like filename, line, position
> etc (depending on what is available from a reader for a given type).
> A possible approach is to add a method to a RecordReader interface which
> produces UserException of type ErrorType.DATA_READ with context data, so that
> when such an UserException is needed it can be easily obtained by invoking
> the method.
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